Part I: General questions. Please pick 3 and write a short essay (no more than 350 words) about each. Please include drawings, if appropriate. Remember that compare and contrast means: tell me what they have in common, and what their key differences are. 2. Please compare and contrast transcription in prokaryotes and eukaryotes 3. Please discuss the ways in which gene expression can be controlled post- transcriptionally 6. Please discuss why mangroves are worth studying. What makes them unusual? What sorts of genes might be expressed differently when grown in fresh and salt water? How might mangroves benefit humans? Part II: More specific questions. Please pick 3 and write a short essay about each. Please include drawings, if appropriate. 1. Please compare the various classes of cloning vectors and discuss their uses. 4. Please describe initiation of transcription by RNA polymerase 2 and why it is so much more complex than other RNA polymerases. 6. Please compare and contrast translation in prokaryotes and eukaryotes.